Consider installing a luminaire at the top of the stairwell in addition to the recommended eight to ten foot space throughout. Generally, when it comes to illuminating stairwells, it can be done with ceiling lights, wall sconces and recessed lights. Stairwells are typically lit 24 hours per day and usually have a very low occupancy. Energy efficient stairwell lights feature sensors that can dim the stairwell lighting fixtures to save even more money when the stairwell is unoccupied.